lkml.org 
[lkml]   [2011]   [May]   [4]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
    Patch in this message
    /
    From
    Date
    Subject[PATCHv1 -next] LEDS: LED module of DA9052 PMIC driver
    Hi,

    LED Driver for Dialog Semiconductor DA9052 PMICs.

    Changes made since last submission:
    . used 'flags' field of led_platform_data to pass the led index

    Signed-off-by: Dajun Chen <dchen@diasemi.com>
    ---

    diff -Naur linux-next-20110421.orig/drivers/leds/Kconfig linux-next-20110421/drivers/leds/Kconfig
    --- linux-next-20110421.orig/drivers/leds/Kconfig 2011-04-26 09:32:34.000000000 +0500
    +++ linux-next-20110421/drivers/leds/Kconfig 2011-04-26 10:02:16.000000000 +0500
    @@ -284,6 +284,14 @@
    This option enables support for on-chip LED drivers found
    on Dialog Semiconductor DA9030/DA9034 PMICs.

    +config LEDS_DA9052
    + tristate "Dialog DA9052 LEDS"
    + depends on LEDS_CLASS
    + depends on PMIC_DA9052
    + help
    + This option enables support for on-chip LED drivers found
    + on Dialog Semiconductor DA9052 PMICs
    +
    config LEDS_DAC124S085
    tristate "LED Support for DAC124S085 SPI DAC"
    depends on LEDS_CLASS
    diff -Naur linux-next-20110421.orig/drivers/leds/leds-da9052.c linux-next-20110421/drivers/leds/leds-da9052.c
    --- linux-next-20110421.orig/drivers/leds/leds-da9052.c 1970-01-01 05:00:00.000000000 +0500
    +++ linux-next-20110421/drivers/leds/leds-da9052.c 2011-04-26 09:57:59.000000000 +0500
    @@ -0,0 +1,214 @@
    +/*
    + * LED Driver for Dialog DA9052
    + *
    + * Copyright(c) 2011 Dialog Semiconductor Ltd.
    + *
    + * Author: Dajun Chen <dchen@diasemi.com>
    + *
    + * This program is free software; you can redistribute it and/or modify it
    + * under the terms of the GNU General Public License as published by the
    + * Free Software Foundation; either version 2 of the License, or (at your
    + * option) any later version.
    + *
    + */
    +
    +#include <linux/module.h>
    +#include <linux/kernel.h>
    +#include <linux/init.h>
    +#include <linux/platform_device.h>
    +#include <linux/leds.h>
    +#include <linux/workqueue.h>
    +#include <linux/slab.h>
    +
    +#include <linux/mfd/da9052/reg.h>
    +#include <linux/mfd/da9052/da9052.h>
    +#include <linux/mfd/da9052/pdata.h>
    +#include <linux/mfd/da9052/gpio.h>
    +
    +struct da9052_led {
    + struct led_classdev cdev;
    + struct work_struct work;
    + struct da9052 *da9052;
    + u8 led_index;
    + u8 id;
    + int brightness;
    +};
    +
    +u8 led_reg[] = {
    + DA9052_LED_CONT_4_REG,
    + DA9052_LED_CONT_5_REG,
    +};
    +
    +static int da9052_set_led_brightness(struct da9052_led *led)
    +{
    + int error;
    +
    + error = da9052_reg_write(led->da9052, led_reg[led->led_index],
    + led->brightness | DA9052_LED_CONT_DIM);
    + if (error < 0)
    + dev_err(led->da9052->dev, "Failed to set led brightness, %d\n", error);
    + return error;
    +}
    +
    +static void da9052_led_work(struct work_struct *work)
    +{
    + struct da9052_led *led = container_of(work,
    + struct da9052_led, work);
    +
    + da9052_set_led_brightness(led);
    +}
    +
    +static void da9052_led_set(struct led_classdev *led_cdev,
    + enum led_brightness value)
    +{
    + struct da9052_led *led;
    +
    + led = container_of(led_cdev, struct da9052_led, cdev);
    + led->brightness = value;
    + schedule_work(&led->work);
    +}
    +
    +
    +static int da9052_configure_leds_gpio(struct da9052_led *led)
    +{
    + int error;
    + u8 register_value = DA9052_OUTPUT_OPENDRAIN |
    + DA9052_SUPPLY_VDD_IO1 << 2 | 1 << 3;
    +
    + error = da9052_reg_update(led->da9052, DA9052_GPIO_14_15_REG,
    + DA9052_GPIO_MASK_LOWER_NIBBLE,
    + register_value);
    +
    + if (error < 0) {
    + dev_err(led->da9052->dev, "Failed to write GPIO 14-15 reg, %d\n", error);
    + return error;
    + }
    +
    + error = da9052_reg_update(led->da9052, DA9052_GPIO_14_15_REG,
    + DA9052_GPIO_MASK_UPPER_NIBBLE,
    + register_value << DA9052_GPIO_NIBBLE_SHIFT
    + );
    + if (error < 0)
    + dev_err(led->da9052->dev, "Failed to write GPIO 14-15 reg, %d\n", error);
    +
    + return error;
    +}
    +
    +static int __devinit da9052_led_probe(struct platform_device *pdev)
    +{
    + struct da9052_pdata *pdata;
    + struct da9052 *da9052;
    + struct led_platform_data *pled;
    + struct da9052_led *led;
    + int error, i;
    +
    + da9052 = dev_get_drvdata(pdev->dev.parent);
    + pdata = da9052->dev->platform_data;
    + if (pdata == NULL) {
    + dev_err(&pdev->dev, "No platform data\n");
    + error = -ENODEV;
    + goto err_mem;
    + }
    +
    + pled = pdata->pled;
    +
    + if (pled == NULL) {
    + dev_err(&pdev->dev, "Failed no platform data for LED\n");
    + return -ENOMEM;
    + }
    +
    + led = kzalloc(sizeof(struct da9052_led) * pled->num_leds, GFP_KERNEL);
    + if (led == NULL) {
    + dev_err(&pdev->dev, "Failed to alloc memory\n");
    + return -ENOMEM;
    + }
    +
    + for (i = 0; i < pled->num_leds; i++) {
    + led[i].cdev.name = pled->leds[i].name;
    + led[i].cdev.brightness_set = da9052_led_set;
    + led[i].cdev.brightness = LED_OFF;
    + led[i].brightness = 0;
    + led[i].led_index = pled->leds[i].flags;
    + led[i].da9052 = dev_get_drvdata(pdev->dev.parent);
    + INIT_WORK(&led[i].work, da9052_led_work);
    +
    + error = led_classdev_register(pdev->dev.parent, &led[i].cdev);
    + if (error) {
    + dev_err(&pdev->dev, "Failed to register led %d\n", led[i].led_index);
    + goto err_register;
    + }
    +
    + error = da9052_set_led_brightness(&led[i]);
    + if (error) {
    + dev_err(&pdev->dev, "Unable to init led %d\n", led[i].led_index);
    + continue;
    + }
    + }
    + error = da9052_configure_leds_gpio(led);
    + if (error) {
    + dev_err(&pdev->dev, "Failed to configure GPIO Led,%d\n", error);
    + goto err_register;
    + }
    +
    + platform_set_drvdata(pdev, led);
    +
    + return 0;
    +
    +err_register:
    + for (i = i - 1; i >= 0; i--) {
    + led_classdev_unregister(&led[i].cdev);
    + cancel_work_sync(&led[i].work);
    + }
    +err_mem:
    + kfree(led);
    + return error;
    +}
    +
    +static int __devexit da9052_led_remove(struct platform_device *pdev)
    +{
    + struct da9052_led *led = platform_get_drvdata(pdev);
    + struct da9052_pdata *pdata;
    + struct da9052 *da9052;
    + struct led_platform_data *pled;
    + int i;
    +
    + da9052 = dev_get_drvdata(pdev->dev.parent);
    + pdata = da9052->dev->platform_data;
    + pled = pdata->pled;
    +
    + for (i = 0; i < pled->num_leds; i++) {
    + led[i].brightness = 0;
    + da9052_set_led_brightness(&led[i]);
    + led_classdev_unregister(&led[i].cdev);
    + cancel_work_sync(&led[i].work);
    + }
    +
    + kfree(led);
    +
    + return 0;
    +}
    +
    +static struct platform_driver da9052_led_driver = {
    + .driver = {
    + .name = "da9052-leds",
    + .owner = THIS_MODULE,
    + },
    + .probe = da9052_led_probe,
    + .remove = __devexit_p(da9052_led_remove),
    +};
    +
    +static int __init da9052_led_init(void)
    +{
    + return platform_driver_register(&da9052_led_driver);
    +}
    +module_init(da9052_led_init);
    +
    +static void __exit da9052_led_exit(void)
    +{
    + platform_driver_unregister(&da9052_led_driver);
    +}
    +module_exit(da9052_led_exit);
    +
    +MODULE_AUTHOR("Dajun Chen <dchen@diasemi.com> ");
    +MODULE_DESCRIPTION("LED driver for Dialog DA9052 PMIC");
    +MODULE_LICENSE("GPL v2");
    diff -Naur linux-next-20110421.orig/drivers/leds/Makefile linux-next-20110421/drivers/leds/Makefile
    --- linux-next-20110421.orig/drivers/leds/Makefile 2011-04-26 09:32:34.000000000 +0500
    +++ linux-next-20110421/drivers/leds/Makefile 2011-04-26 10:01:02.000000000 +0500
    @@ -31,6 +31,7 @@
    obj-$(CONFIG_LEDS_FSG) += leds-fsg.o
    obj-$(CONFIG_LEDS_PCA955X) += leds-pca955x.o
    obj-$(CONFIG_LEDS_DA903X) += leds-da903x.o
    +obj-$(CONFIG_LEDS_DA9052) += leds-da9052.o
    obj-$(CONFIG_LEDS_WM831X_STATUS) += leds-wm831x-status.o
    obj-$(CONFIG_LEDS_WM8350) += leds-wm8350.o
    obj-$(CONFIG_LEDS_PWM) += leds-pwm.o
    Regards,
    Ashish


    \
     
     \ /
      Last update: 2011-05-04 11:27    [W:0.035 / U:60.088 seconds]
    ©2003-2016 Jasper Spaans. hosted at Digital OceanAdvertise on this site